Makefile in C: all vs target -std=c1x error

Question

I am working on a C homework assignment and I came across a simple yet specific error when creating my Makefile.

My initial Makefile was simple:

all: numbers.o
    gcc -Wall -pedantic -std=c1x numbers.c -o numbers
clean: 
    rm *.o

For whatever reason, despite the C program compiling correctly in the terminal, I repeatedly get the following error:

gcc: error: -std=c1x: No such file or directory 
Makefile:2: recipe for target 'all' failed

Answer 1

The problem was actually because I had copied the gcc line from a pdf file. Thanks to the comment by raspy:

For sure it has nothing to do with target name. It looks like gcc did not treat the switch as a switch, but rather as a file name. Have you copied this command from somewhere? It happens that the - is not a simple dash but some dashy-looking Unicode character, most notably converted in word processors.

Answer 2

I've worked with WebRTC well over a little while now and am deploying a production level website for many-to-many broadcasts so I can happily help you with this answer but don't hit me as I'm about to spoil some of your fun.

The Session Description Protocol you generate would had contained the send/recv IPs of both connecting users. Now because none of you are actually port-forwarded to allow this connection or to act as a host, a TURN would be in fact required to mitigate this issue. For security reasons it's like this and most users will require a TURN if you decide to go this route.

You can skip a TURN server completely but still requiring a server, you'd go the route of sending/receiving RTP and routing it like an MCU/SFU.

These solutions are designed to take in WebRTC produced tracks and output them to many viewers (consumers).

Here's a SFU I use that works great for many-to-many if you can code it. It's Node.JS friendly if you don't know other languages outside JavaScript. https://mediasoup.org/